diff --git a/reactos/tools/rsym/dwarf2.h b/reactos/tools/rsym/dwarf2.h
index 18ff034f57f..8e9c6120c81 100644
--- a/reactos/tools/rsym/dwarf2.h
+++ b/reactos/tools/rsym/dwarf2.h
@@ -802,27 +802,27 @@ typedef struct
 
 typedef struct
 {
-    ULONG Length;
+    unsigned long Length;
     char *Next;
     char *CiePointer;
-    ULONG PcBegin;
-    ULONG PcRange;
-    ULONG AugLength;
+    unsigned long PcBegin;
+    unsigned long PcRange;
+    unsigned long AugLength;
     char *AugData;
     char *Instructions;
 } DW2FDE, *PDW2FDE;
 
 typedef struct _CFSTATE
 {
-    ULONG Location;
-    ULONG Code;
-    ULONG Reg;
-    ULONG Reg2;
-    ULONG FramePtr;
-    ULONG FramePtrDiff;
-    ULONG Offset;
-    ULONG IsUwop;
-    ULONG Scope;
+    unsigned long Location;
+    unsigned long Code;
+    unsigned long Reg;
+    unsigned long Reg2;
+    long FramePtr;
+    long FramePtrDiff;
+    long Offset;
+    unsigned long IsUwop;
+    unsigned long Scope;
 } DW2CFSTATE, *PDW2CFSTATE;
 
 #define NextCIE(p) ((void*)((char*)p + p->Length + 4))
diff --git a/reactos/tools/rsym/rsym64.c b/reactos/tools/rsym/rsym64.c
index cc582601cb2..c06a93f729a 100644
--- a/reactos/tools/rsym/rsym64.c
+++ b/reactos/tools/rsym/rsym64.c
@@ -131,7 +131,7 @@ DwExecIntruction(PDW2CFSTATE State, char *pc)
     {
         State->Code = DW_CFA_offset;
         State->Reg = Code & 0x3f;
-        Length += DwDecodeUleb128(&State->Offset, pc + 1);
+        Length += DwDecodeUleb128((unsigned long*)&State->Offset, pc + 1);
         State->Offset *= 8; // fixme data alignment
         State->IsUwop = 1;
     }
@@ -162,7 +162,12 @@ DwExecIntruction(PDW2CFSTATE State, char *pc)
             break;
         case DW_CFA_offset_extended:
             Length += DwDecodeUleb128(&State->Reg, pc + Length);
-            Length += DwDecodeUleb128(&State->Offset, pc + Length);
+            Length += DwDecodeUleb128((unsigned long*)&State->Offset, pc + Length);
+            State->IsUwop = 1;
+            break;
+        case DW_CFA_offset_extended_sf:
+            Length += DwDecodeUleb128(&State->Reg, pc + Length);
+            Length += DwDecodeSleb128(&State->Offset, pc + Length);
             State->IsUwop = 1;
             break;
         case DW_CFA_restore_extended:
@@ -184,19 +189,19 @@ DwExecIntruction(PDW2CFSTATE State, char *pc)
             break;
         case DW_CFA_def_cfa:
             Length += DwDecodeUleb128(&State->Reg, pc + Length);
-            Length += DwDecodeUleb128(&State->FramePtr, pc + Length);
+            Length += DwDecodeUleb128((unsigned long*)&State->FramePtr, pc + Length);
             State->IsUwop = 1;
             break;
         case DW_CFA_def_cfa_register:
             Length += DwDecodeUleb128(&State->Reg, pc + Length);
             break;
         case DW_CFA_def_cfa_offset:
-            Length += DwDecodeUleb128(&State->FramePtr, pc + Length);
+            Length += DwDecodeUleb128((unsigned long*)&State->FramePtr, pc + Length);
             State->IsUwop = 1;
             break;
         case DW_CFA_def_cfa_sf:
             Length += DwDecodeUleb128(&State->Reg, pc + Length);
-            Length += DwDecodeSleb128((LONG*)&State->FramePtr, pc + Length);
+            Length += DwDecodeSleb128(&State->FramePtr, pc + Length);
             State->FramePtr *= 8; // data alignment
             State->IsUwop = 1;
             break;